Cracking Slab 2 Weeks after pour

[Perrorojo]

ALL concrete (with limited exotic exceptions) is going to crack. The unknown is how well distributed those cracks are and if they can be seen. (Reinforcement helps influence this.)



Shrinkage cracks like these are determined partly by how the slab is finished but mostly by how the slab is designed. If you have a 40X70 with no visible cracking, yours probably does not have thickened edges (like this one) and is thinner than this one. (If you sweep the floor good and wet it down, I expect you'll also find some cracking.)

We're minimum 5" thick everywhere with two 10" deep sections for the lift and a 6" area about the size of a VW bug for the planer. We're on a gravel surface with no fill. The site is as good as it gets in Indiana for concrete work. No pilings or gravel fill work needed.